Oil-burning system



APatente l.Fully 8, 1924..

11,599,574 o UNER @A 'ATNT FEC.

FRANK RYERSON CRANE, JR., OF CHICAGO, ILLINOIS, ASSIGNOR TO RYER-SONCRANE,

, INC., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

oit-BURNING SYSTEM.

Application led' January 27, 1922. Serial No. 532,140.

To all 'whom t may concern.'

Be it known that I, FRANK R. CRANE, Jr., a citizen of the UnitedStates,y residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inOil-Burning Systems, of which the following is a specification.

This invention relates to improvements in oil burning systems. j

One of the objects of the invention is to provide an oil burning systemin which the oil and the air used therewith to promote j combustionthereof, are subjected to uniform equal pressures.

Another object is to provide asystem in which a single pump is used bywhich air pressure is superimposed upon a body of oil contained in acommonservice reservoir or tank and from which oil and air areindependently conducted to an atomizing l burner near the point ofutilization.

Another object is to subject oil and air in the same tank to pneumaticpressure whereby the body of air will act as a cushion for the oil, thatthe flow of oil thru the atomizing burner may be more regular,continuous and uniform than when directly moved by a pump.y i'

Another object is the provision of means for filling the service tankfrom a main reservoir by the use of the motoroperating to attenuate theair in the service tank,

thereby causing the oil to flow thereinto.

Another object is to cleanse the air used with the oil to promotecombustion, by first passing ythe air through a body of lubricating oil,the oil vapor caused by ebullition of the oil dueto the air passingtherethru, serving as a` lubricant for the air pump.

Other objects and advantages of the invention will hereinafter appear.

In the drawings Fig. 1 is a schematic view of the system in amoreincompleX form without the re iinements that may be employedtherewith and shown morespecilcally in Fig. 3.

Fig. 2 is a side elevation ofthe service tank when the motor and rotarypump is mounted thereon.

Fig. 3 is a transverse section taken substantially in a plane with pipe16 of Fig. 2. I

In all the views the same reference charw acters are employed toindicate similar parts.

forany purpose for .which the combustionV of oil is desirable, and insituations where it is desirable to install systems of this character.which will operate by the absence of objectionable noise.

In the particular exemplilication I have shown the system associatedwith a hot air furnace 5 having heat conveying pipes 6 and a pipe 7 forconveying away the waste products of combustion. 'Ihe fire pot 8 islined with refractory material 9 against which the flame from the burner10 impinges. A torch or pilot light 11 is located below the atomizingburner 10 and a gas pipe 12 supplies the fuel to the pilot burner.

14 is the service tank or reservoir to be partially filled with oil 15.A pipe 16 extends to the bottom of the tank 14 and eX- tends from thetank to the atomizing burner 10, thereby carrying the oil 15 to theburner. AnotherI pipe 17 -is secured to the top of the tank 14 bysuitable means, as at 18, and branches into a pipe 1.9 which isconnected to the pump 20 in Fi 1 and to a four-way valve 27 in Fig. 3.pipe 21 conveys air from the tank and from the pump thru thefour-wayvalve'tothe atomizing burner 10.

The ump 20, which is an air pump, is driven Ey the electric motor 25thru a cou- 'pling 26. Normally the pipe 17 is connected to the pipe 19thru the valve 27, and when the pump is rotating it compresses air inthe tank 14, and at the same time air is conveyed thru the pipe 19 andthepipe 21 to the burner 10.

The air intake to the pump 20 is thru a tank 28. Tank 28 has a vent hole29 and contains lubricating oil 30A up to L'the vent hole.- One objectof the vent hole is to indi- @are the level of the' on so in the tank.The oil is lled into the tank thru the cap closing filling opening 31.The vent'hole 29 is vrelatively small with respect to the main airintake pipe 32, which is open to the atmosphere, the lower end of whichextends nearly to the bottom of the tank 28. A pipe 33 is connected thruthe intake pipe 34 and a check valve 35, so that normally, air will be'taken into the pump 2O thru self-opening check valve 35 and the tank 28after passin thru the lubricating oil 30. The passage o the air thru thelubricating oil will produce ebullition of the oil and more or less oilvapor will pass with the air thru pipe 33 into pump 2O and lubricate it.A relatively small quantity of air lwill also pass into tank 28 thruvent 29 but'the major portion will enter thru the pipe 32; rlhe air thatpasses into the ump thru the pipe 33 and 34l is compressed Ey the pumpand passes out thru the discharge opening into the pipes 19 and 21, thusproducing air pressure in the service tank 14 roportional to theresistance interposed by t e burner, 'and also causing the air to passthru the pipe 21 tothe burner 10. A safety valve 36 is located in thepipe 37 to prevent the air pressure from rising too high in the tank 14.

A pipe 38 connects the intake of the pump 2O with the pipe 37 whichcontains a blow off valve 36. When the apparatus shown in Fig. 3 is tobe used the pump 20 is set into operation by the motor 25. At this timethe valve 27 is turned to connect the intake of the pump with pipe 34and pipe 39 with pipe 38; air will therefore, pass' into the `pipe 32thru the oil contained in the tank 28 and thru the pipe 33, check valve35, into the pipe 34, and from thence thru the four-way valve 27 intothe pump'. Air under pressure will pass from the pump to the pipe 19intoy the upper part of the supply tank 14 thru pipe 39, valve 27 andpipe 38, and air will also pass thru the pipe 21 to the burner 10, whichwill atomize the oil coming to the burner thru pipe 16. Now, when it isdesirable to partially fill the tank 14 with oil 15 from an outsidereservoir, which may be located at a lower level than the service willenter thru the supply pipe 41 from the` supply reservoir when the valve42 is open. The air will be exhausted from the pump thrul theburner 10,as at this time no oil will pass into the burner because of the fact othe high attenuation of air in the tank 1 f In Fig. 1 I have shown ahand operated pump 43 operated by the handle 44 -for pumping oil intothe tank 14 thru the pipe 41 from the storage tank or supply reservoirnot shown. y n

The means for controlling the apparatus, that is to say, for stoppingthe'rotation of the motor 25, when there is any serious derangement withthe devices for feeding fuel to the furnace, standard safe-guardingdevices may be used in the manner herein disclosed.

The double pole switch 46 is connected between the service wires 47and`48 and the mains 47 and 48. The wire 47 isconnected to the 4motor 25thru a switch 50 which is controlled by an electromagnet 51. When theswitch is closed the electric motor will operate, and when it is openthe motor will stop. A heat-responsive device 52 1S contained in thecircuit 53 and so also is a heatresponsive device 54 which is affectedby the pilot. burner 11 associated with the spraying burner 10. rllhewires 55 and 56 connect the transformer 57 with the service wires 47 and48', and the secondary wires 58 and 59 are those in which thesafe-guarding automatically operating devices are contained. v

A pipe 60 connects'the casing 61 with the upper part of tank 14. `Adiaphragm 62 extends across the end of the pipe 60, having a packingdisk 63 to close the pipe. The edge of the diaphragm is clamped. to theedge of the casing by the cap 64. Inside cap. 64 is a coiled spring 65bearing on the diaphragm and adjustable by a threaded stem 66 when thehandle 67 is turned. This provides a safety device to prevent pressurefrom rising dangerously high in tank 14. This may be used supplementaltothe pressure valve 36 or without it. I

l While I have herein shown .a single embodiment of my device for thepurpose of clear disclosure, it will be manifest, to per!` from and toserve as a reservoir of air for the burner; a pipe leading from thebottom ofthe tank to the burner gganother pipe leading from the top ofthe tank to supply air to the burner and an oil supply pipe connected tothe tank in combination with a valve movableto connect the intake of thepump to said tank to exhaust air therefrom to fill 'the tank with oilwhen said supply Moom pipe is open and alternatively movable to closesaid air connection and to connect the intake port of the pump toanother source of air supply and to c onnect the discharge 5 port of thepump to said tank,

2. A system of the character described comprising a spraying burner; atank for containing liquid fuel; an air pump arranged to pump air intothe tank to produce preslc sure to move the liqluid; a pipe lea from thebottom of t e tank to the burner to conve the liquid fuel thereto;another pipe lea ing from the to of the tank to the burner to convey airun er pressure to said burner; another tank connected to the air intakeof the pump and a liquid in the last mentioned tank thru which the airpasses on its Way to the pump.

lin testimony whereof l hereunto subscribe my name.

FRANK RYERSON CRANE, Je,

